Coating Terms

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Gallon (U.S. or Imperial U.K)

Volume unit. Imperial gallon corresponds to 4,54 liters and U.S gallon corresponds to 3,785 liters.
 

Name for coatings applied by dipping cold rolled carbon steel plates or various carbon steel objects into a melted aluminum, zinc, silicon alloy bath. These coatings are composed of 55% zinc, 43,4% aluminum, 1,6% silicone; and are also known as Aluzinc or Zincalume.

Liquid that is obtained from distillation of raw petroleum and that includes mainly aliphatic hydrocarbons. While the main usage is in internal combustion engines, it is also used as a coating solvent. Besides the general purpose gasoline, some special gasoline types, distilled at different temperature intervals, are also used as coating solvents. Depending on the properties of the raw petroleum, gasoline can chemically contain more than 120 hydrocarbon types. Many of those hydrocarbons have saturated structures with 4 to 12 carbons on their backbone.

Formation of insoluble coating films is aimed by crosslinking binders present in the coating formulation. Determination of crosslinking ratio of coating film has influence on the performance of the film after application. In order to determine this ratio, a solvent or solvent blend is chosen to dissolve the unreacted binder left in the film. Pieces of coating film, scraped from the surface, are extracted with the chosen solvent (blend) and unreacted binder is removed from the film together with the pigments and fillers attached to it. Percentage ratio of remaining sample weight to the initial sample weight is called the gel fraction.

Segment of industrial coatings market that covers the sub-segments which are not classified as seperate technical or commercial groups. According to Paint Research Association (PRA), these sub-segments are as follows: Heavy Duty Coatings, Heating, Ventilation and Conditioning Coatings; Auto Ancillary Industry Coatings; Metal Furniture, Accessories and Connections Coatings, General Metal Industry Coatings. However, since industrial structure in Turkey has some differences with those in highly developed industrial countries, the General Industrial Coatings segment in Turkey, includes some other activity fields which PRA classifies as seperate segments of Industrial Coatings market. In line with this, General Industrial Coatings activities in Kansai-Altan are structured to serve the following sub-segments: Agricultural Vehicle Coatings, Heavy Duty Machinery Coatings, Steel Construction Coatings, Construction Material Coatings, Household Instrument Coatings, General Metal Industry Coatings. See Also Industrial Coatings.

Industrial coatings

Due to the market dynamics as well as the sophistication of paint technologies, industrial coatings market is divided into sub categories. Prestigious UK based research institute Paint Research Association (PRA) defines these categories as, automotive OEM, automotive refinish, motorcycles, trucks, buses and other vehicles, rail, marine, aircraft, protective coatings, industrial wood coatings, agriculture, construction and earthmoving, pre-coated metal sheet and extrusions, metal packaging coatings, general industrial coatings. Some fields of activity in the Industrial coatings market in Turkey do not have sizes enough to classify them as seperate market segments. Therefore, they are included in the segment called General Industrial Coatings. See Also General industrial coatings

Transparent or semi-transparent inorganic substance, main raw material of which is silica (SiO2). There are sub-groups such as soda-lime-silica glass, borosilicate glass, phosphate glass and crystal (lead glass).

Glass transition temperature

Temperature at which amorphous polymers undergo an evident transformation from brittle to elastomeric behaviour upon heating.
 

Temperature at which amorphous polymers undergo an evident transformation from brittle to elastomeric behaviour upon heating.

Percentage ratio of the amount of reflected light from a surface having the same angle with the normal as the light coming to the surface, to the total amount of light coming to a surface.

A term defining the degree to which the gloss of an organic coating is retained after a period of service-life. Generally gloss retention is used for high gloss topcoats and it is the ratio in percentage of original surface gloss to the gloss after a service-life.

Glycerine occurs naturally in structures of vegetable and animal fats. Synthesis is achieved by oxidation of propylene. It is the most widely used polyol in alkyd resin production.
Chemical name: Propane-1,2,3-triol or 1,2,3-propanetriol
Chemical formula: 

Melting point: 18,2°C; boiling point: 290°C

Compounds, obtained from reaction of glycol ethers with acetic acid, having both ether and hydroxyl bonds. (e.g, Butyl glycol acetate = Ethylene glycol monobutyl ether acetate). Glycol ether esters are among the most widely used oxygenated solvent groups.

Compounds, formed by reactions of glycols (e.g, ethylene glycol) having both ether and hydroxyl bonds. For instance, structure of ethylene glycol monobutyl ether is given below. Glycol ethers are among the most widely used oxygenated solvent groups.

Spectrometer that carries out color measurements via detectors placed in such a way that enables measuring of different reflection angles from a colored surface. Goniospectrometers are used to measure colors that change at different angles, especially colors of coatings containing metal or pearlescent pigments.

Co-grind

Method for producing paints, containing more than one type of pigments and/or fillers, where pigments and/or fillers are dispersed by grinding together.

Grinding

Paint production step applied to decrease the particle size of pigment aggregates in the fluid medium using mechanical energy. Because grinding of pigments used in wet paints are achieved in liquid media consisting of resin solutions, those processes are also called “wet grinding”.

Fineness of grind

Upper limit of particle size range obtained after dispersion. Fineness of grind is usually stated using two gauges: Metric gauge based on micrometer and Hegman gauge. e.g, in the case that almost all the particles in a pigment paste or coating are 25µm or smaller, fineness of grind is 25µm in metric gauge and 6 in Hegman gauge.

Grindometer

Laboratory device used to determine the upper limit of pigment size of coatings or semi-finished coatings. Grindometers consist of a steel block with a cavity of varying depth starting from zero depth. The deep end of the cavity is filled with the pigmented liquid and the liquid is scraped towards the shallow end with the help of a knife. Depth of cavity at the point where particles are visible is noted as the fineness of grind.

Wet grinding See Grinding

Laboratory device used to determine the upper limit of pigment size of coatings or semi-finished coatings. Grindometers consist of a steel block with a cavity of varying depth starting from zero depth. The deep end of the cavity is filled with the pigmented liquid and the liquid is scraped towards the shallow end with the help of a knife. Depth of cavity at the point where particles are visible is noted as the fineness of grind.

Type of polymerization that allows growth of the polymer chain on different ends as a result of a silicone structured initiator activating alternating ends of polymer chain in turns or activating ends of two separate chains in turns during growth. Monomers used in group transfer polymerization should contain carbonyl or nitrile groups. Such growing polymers are also called living polymers.